I'd like to have that too. I've been stockpiling KRST, around 40 bottles right now, but am still paranoid..EC

Evan,

My God! Forty bottles of KRST would last me well past the rest of my life! I print a fair amount and don't use a bottle a year. I replenish my toner and keep it. No need to toss it, it works fine, even after almost 10 years. I think a lot of good toner goes to waste, to the detriment of the environment and the photographers' wallets.

Plus, there's always Ilford and the Freestyle Legacy Pro selenium toners that are similar, if not identical, to KRST.

Kodak Photographic Handbook

Hello Ian

Don't know if this is any help, but here's a formaula from the 1949 UK Kodak Handbook with suggested dilutions. Good luck boiling the Selelnium powder! If the jpeg below is not very clear will e mail you a bigger file.

"Dissolve the sulphite in about 700 ml of hot water, then add the selenium powder and boil until it is completely dissolved. Allow the solution to cool; then add the ammonium chloride and stir until it is dissolved. Finally make up to the required bulk with cold water."

If you don't have a fume hood, do this boiling outdoors and be sure to stand upwind, and wear a respirator. It takes an hour or more to boile this inot solution with occasional stirring, AND THE FUMES ARE EXTREMELY HARMFUL TO YOUR LUNGS.